“The FA is aware of this matter and is currently investigating it,” she said in a statement.
A formal investigation does not appear to have been opened yet, in this story revealed by The Athletic website.
The identity of the player and the match concerned have not been revealed.
Bookmakers have been intrigued by the large sums wagered in a Championship encounter on a warning against a Gunner.
Arsenal declined to comment.
The development and omnipresence of sports betting operators in British sport has been a regular source of suspicion, as everything has been bet on a match for years.
In 2009, in his autobiography, former Southampton striker Matt Le Tissier confessed to deliberately causing a throw-in in the first seconds of a match after agreeing with a friend to bet on this event.
A teammate had finally prevented the ball from going out and the police had decided not to prosecute the former player after his revelations due to the age of the facts and the lack of profit made.
In 2018, Bradley Wood, a Lincoln City defender in League Two (D4), was suspended for six years after he voluntarily picked up two yellow cards in the FA Cup, as well as for other breaches of betting regulations for sportsmen.